St. Helena Is. (St Helena - Ascension and Tristan Da Cunha) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius; -
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius; -
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 17° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 17° Celsius;
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 17° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 17° Celsius;
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius; -
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 16° Celsius;
Overcast.
Sunrise:
Sunset:
Ex UV
No pollution data.
No pollen data.
7 day forecast for St. Helena Is.
Today (17 September 2025)
| Time |
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
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|
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|
|
|
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|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
14°
|
13°
|
13°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
| Wind direction and speed |
ESE
14
|
ESE
15
|
ESE
15
|
ESE
14
|
ESE
14
|
ESE
13
|
ESE
12
|
ESE
12
|
ESE
12
|
SE
11
|
SE
11
|
SE
11
|
SE
12
|
SE
13
|
SE
14
|
SE
14
|
SE
14
|
SE
14
|
ESE
14
|
ESE
15
|
ESE
15
|
ESE
15
|
| Wind gust (mph) |
20
|
20
|
20
|
19
|
19
|
18
|
17
|
16
|
16
|
15
|
16
|
16
|
18
|
19
|
19
|
19
|
19
|
19
|
19
|
20
|
21
|
21
|
| Visibility |
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
| Humidity |
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
84%
|
84%
|
84%
|
84%
|
85%
|
85%
|
85%
|
85%
|
85%
|
84%
|
84%
|
83%
|
83%
|
82%
|
82%
|
83%
|
| UV | - | - | - | - | 1 | 1 | 3 | 6 | 8 | 8 | 9 | 8 | 5 | 3 | 2 | 1 | 1 | - | - | - | - | - |
Thursday (18 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
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 |
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 |
|
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|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
14°
|
14°
|
| Wind direction and speed (mph) |
ESE
15
|
SE
15
|
SE
15
|
SE
15
|
ESE
15
|
ESE
15
|
ESE
15
|
ESE
15
|
ESE
15
|
ESE
15
|
ESE
15
|
ESE
14
|
ESE
14
|
ESE
13
|
ESE
12
|
ESE
12
|
ESE
13
|
ESE
12
|
ESE
12
|
ESE
14
|
SE
14
|
SE
14
|
SE
15
|
SE
15
|
| Wind gust (mph) |
20
|
21
|
20
|
20
|
20
|
20
|
20
|
20
|
20
|
20
|
19
|
19
|
18
|
17
|
17
|
17
|
17
|
17
|
18
|
18
|
19
|
20
|
19
|
20
|
| Visibility (description) |
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
| Humidity |
84%
|
83%
|
82%
|
82%
|
82%
|
82%
|
81%
|
81%
|
82%
|
83%
|
83%
|
82%
|
82%
|
83%
|
83%
|
83%
|
82%
|
81%
|
81%
|
81%
|
79%
|
78%
|
79%
|
81%
|
| UV | - | - | - | - | - | - | 1 | 1 | 3 | 6 | 8 | 8 | 11 | 10 | 6 | 4 | 2 | 1 | 1 | - | - | - | - | - |
Friday (19 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
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|
|
|
|
|
 |
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
| Wind direction and speed (mph) |
SE
15
|
SE
14
|
SE
14
|
SE
14
|
SE
15
|
SE
15
|
SE
16
|
SE
16
|
SE
16
|
SE
17
|
SE
17
|
SE
17
|
SE
17
|
SE
17
|
SE
17
|
SE
17
|
SE
17
|
SE
18
|
SE
18
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
| Wind gust (mph) |
20
|
19
|
19
|
19
|
20
|
21
|
22
|
22
|
23
|
23
|
24
|
24
|
23
|
23
|
24
|
24
|
24
|
25
|
25
|
25
|
26
|
26
|
26
|
25
|
| Visibility (description) |
VG
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
82%
|
83%
|
84%
|
83%
|
83%
|
83%
|
82%
|
82%
|
83%
|
83%
|
83%
|
83%
|
84%
|
84%
|
84%
|
83%
|
83%
|
83%
|
82%
|
80%
|
82%
|
82%
|
83%
|
84%
|
| UV | - | - | - | - | - | - | 1 | 1 | 3 | 5 | 8 | 11 | 11 | 9 | 6 | 3 | 2 | 1 | 1 | - | - | - | - | - |
Saturday (20 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
14°
|
14°
|
14°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
| Wind direction and speed (mph) |
SE
18
|
SE
18
|
SE
18
|
SE
18
|
SE
18
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
19
|
SE
20
|
SE
20
|
SE
20
|
SE
21
|
SE
21
|
SE
22
|
SE
22
|
SE
22
|
SE
23
|
SE
23
|
| Wind gust (mph) |
24
|
24
|
24
|
25
|
25
|
25
|
25
|
26
|
25
|
26
|
26
|
26
|
26
|
26
|
27
|
27
|
28
|
29
|
29
|
30
|
30
|
30
|
31
|
31
|
| Visibility (description) |
VG
|
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
83%
|
83%
|
83%
|
83%
|
83%
|
82%
|
81%
|
83%
|
83%
|
83%
|
| UV | - | - | - | - | - | - | 1 | 1 | 2 | 6 | 8 | 10 | 10 | 9 | 7 | 5 | 2 | 1 | 1 | - | - | - | - | - |
Sunday (21 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
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|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
13°
|
13°
|
13°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
| Wind direction and speed (mph) |
SE
23
|
SE
23
|
SE
23
|
SE
24
|
SE
24
|
SE
24
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
24
|
SE
24
|
SE
25
|
SE
25
|
SE
25
|
SE
25
|
SE
24
|
SE
24
|
SE
24
|
SE
24
|
| Wind gust (mph) |
31
|
32
|
32
|
33
|
33
|
34
|
34
|
35
|
35
|
34
|
34
|
34
|
34
|
33
|
33
|
34
|
34
|
34
|
34
|
33
|
33
|
33
|
33
|
33
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
VG
|
| Humidity |
84%
|
84%
|
83%
|
83%
|
83%
|
84%
|
83%
|
83%
|
83%
|
82%
|
84%
|
83%
|
83%
|
82%
|
82%
|
82%
|
83%
|
81%
|
81%
|
80%
|
80%
|
79%
|
79%
|
79%
|
| UV | - | - | - | - | - | - | 1 | 1 | 3 | 6 | 7 | 11 | 11 | 10 | 8 | 5 | 2 | 1 | 1 | - | - | - | - | - |
Monday (22 September 2025)
| Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
| Wind direction and speed (mph) |
SE
24
|
SE
24
|
SE
24
|
ESE
25
|
ESE
23
|
SE
23
|
SE
23
|
SE
24
|
| Wind gust (mph) |
33
|
34
|
34
|
34
|
32
|
32
|
34
|
34
|
| Visibility (description) |
G
|
VG
|
G
|
VG
|
VG
|
VG
|
G
|
VG
|
| Humidity |
78%
|
80%
|
77%
|
76%
|
76%
|
75%
|
76%
|
75%
|
| UV | - | - | 1 | 6 | 11 | 5 | 1 | - |
Tuesday (23 September 2025)
| Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
16°
|
16°
|
17°
|
16°
|
17°
|
17°
|
17°
|
| Feels like temperature (°C) |
12°
|
12°
|
11°
|
12°
|
12°
|
12°
|
12°
|
12°
|
| Wind direction and speed (mph) |
ESE
24
|
SE
24
|
ESE
25
|
ESE
26
|
ESE
25
|
ESE
25
|
ESE
25
|
ESE
24
|
| Wind gust (mph) |
34
|
35
|
36
|
36
|
35
|
34
|
35
|
35
|
| Visibility (description) |
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
75%
|
76%
|
75%
|
75%
|
75%
|
75%
|
75%
|
75%
|
| UV | - | - | 1 | 6 | 10 | 5 | 1 | - |
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Forecast for 02:00 (UTC), Wed
Updated 01:22 (UTC+1) on Wed 17 Sep 2025
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